EtherFast Cable/DSL Router with 8-Port Switch

4.I am not able to access the Router’s Web-based Utility Setup page.

A.Refer to “Problem #2, I want to test my Internet connection” to verify that your computer is properly connected to the Router.

B.Refer to “Appendix C: Finding the MAC Address and IP Address for Your Ethernet Adapter” to verify that your computer has an IP Address, Subnet Mask, Gateway, and DNS.

C.Set a static IP address on your system; refer to “Problem #1: I need to set a static IP address.”

D.Refer to “Problem #10: I need to remove the proxy settings or the dial-up pop-up window (for PPPoE users).”

5.I can’t get my Virtual Private Network (VPN) to work through the Router.

Access the Router’s web interface by going to http://192.168.1.1 or the IP address of the Router, and go to the Security => VPN Passthrough tab. Make sure you have IPsec passthrough and/or PPTP passthrough enabled.

VPNs that use IPSec with the ESP (Encapsulation Security Payload known as protocol 50) authentication will work fine. At least one IPSec session will work through the Router; however, simultaneous IPSec sessions may be possible, depending on the specifics of your VPNs.

VPNs that use IPSec and AH (Authentication Header known as protocol 51) are incompatible with the Router. AH has limitations due to occasional incompatibility with the NAT standard.

Change the IP address for the Router to another subnet to avoid a conflict between the VPN IP address and your local IP address. For example, if your VPN server assigns an IP address 192.168.1.X (X is a number from 1 to 254) and your local LAN IP address is 192.168.1.X (X is the same number used in the VPN IP address), the Router will have difficulties routing information to the right location. If you change the Router’s IP address to 192.168.2.1, that should solve the problem. Change the Router’s IP address through the Basic Setup tab of the Web-based Utility. If you assigned a static IP address to any computer or network device on the network, you need to change its IP address accordingly to 192.168.2.Y (Y being any number from 1 to 254). Note that each IP address must be unique within the network.

Your VPN may require port 500/UDP packets to be passed to the computer that is connecting to the IPSec server. Refer to “Problem #7, I need to set up online game hosting or use other Internet applications” for details.

Check the Linksys website at www.linksys.com for more information.

6.I need to set up a server behind my Router.

To use a server like a web, ftp, or mail server, you need to know the respective port numbers they are using. For example, port 80 (HTTP) is used for web; port 21 (FTP) is used for FTP, and port 25 (SMTP outgoing) and port 110 (POP3 incoming) are used for the mail server. You can get more information by viewing the

Appendix A: Troubleshooting

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Common Problems and Solutions

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Linksys BEFSR81 manual Am not able to access the Router’s Web-based Utility Setup, Need to set up a server behind my Router
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BEFSR81 specifications

The Linksys BEFSR81 is a highly regarded router that stands as a staple in home networking solutions. With its robust set of features, it has catered to both casual users and technology enthusiasts alike. The BEFSR81 is primarily known for its versatile connectivity options, making it a popular choice for users looking to connect multiple devices without compromising speed or reliability.

One of the standout features of the Linksys BEFSR81 is its ability to support up to eight Ethernet ports, allowing for extensive wired connections. This is particularly beneficial for users with multiple devices that require stable internet access, such as gaming consoles, desktop computers, and smart home devices. Additionally, the router supports advanced networking features, including DHCP server capabilities and network address translation (NAT), further optimizing performance and security.

In terms of security, the BEFSR81 offers stateful packet inspection firewalls and support for Wi-Fi Protected Access (WPA) encryption, ensuring that users' data and privacy are well-protected. It also includes features like MAC address filtering, which allows users to create a whitelist of devices permitted to access the network, bolstering security even further.

The Linksys BEFSR81 adopts a user-friendly interface that simplifies the setup process, making it accessible for individuals with varying levels of technical expertise. Users can manage their network settings effortlessly via the web-based management interface, enabling them to configure passwords, adjust settings, and monitor network activity.

Moreover, the BEFSR81 supports Quality of Service (QoS) features that prioritize bandwidth for certain applications, ensuring that streaming services, online gaming, and video conferencing perform optimally without lag. This is particularly advantageous in households with numerous users engaging in data-intensive activities simultaneously.

Overall, the Linksys BEFSR81 remains a reliable choice for those seeking a well-rounded router that combines a feature-rich design with robust performance. Whether for home office use, casual browsing, or intensive gaming, the BEFSR81 meets the demands of modern networking needs, ensuring a seamless and secure internet experience for its users.
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